#!/usr/bin/env perl

use strict;
use warnings;

my ($g, $c, $p) = split / /, <>; chomp $p;
my $line = <>; chomp $line;
my @sa = split //, $line;
my ($gg, $cc, $pp) = (0, 0, 0);
for my $c (@sa) {
  $gg++ if $c eq 'G';
  $cc++ if $c eq 'C';
  $pp++ if $c eq 'P';
}

my $ans = 0;
my ($mg, $mc, $mp) = ($g < $cc ? $g : $cc, $c < $pp ? $c : $pp, $p < $gg ? $p : $gg);
$ans += $mg * 3;
$ans += $mc * 3;
$ans += $mp * 3;
$g -= $mg;
$c -= $mc;
$p -= $mp;
$gg -= $mp;
$cc -= $mg;
$pp -= $mc;
$ans += $g < $gg ? $g : $gg;
$ans += $c < $cc ? $c : $cc;
$ans += $p < $pp ? $p : $pp;

print $ans, "\n";